Clutch mechanism.



H. KUNTZLER.

CLUTCH MECHANISM.

APPLICATION FILED AUG.7,19lI.

Patented Aug. 31. 1915.

3 SHEETS-SHEE. l.

INVENTOR Henry Ki'mtsler ATTORIJEV WITNESSES WW H. KUNTZLER.

V CLUTCH MECHANISM.

APPLICATION FILED AUGJ. 1911.

1,1 5 1,803 ratented Kug; 31, 1915.

Q WITNESSES N /A/VENTOR Henry Kilnf ler BY ATTOR/VE Y H. K U NTZLER.

CLUTCH MECHANISM.

APPLICATION FILED AUGJ. 19H.

1 1 1 ,803. Patented Aug. 31, 1915.

3 SHEETS-SHEET 3.

do I um, I I mum Z X IIIIHIIIHIIIHII Hill I! Z (lllUIlIHII/l "=..4 WITNESSES I/VVE/VTOR Z I o Z30 Henry Kuni ler UNITED STATES PATENT OFFICE.

HENRY KUNTZLER, 01E WYOMING PENNSYLVANIA, ASSIGNOR T0 ADDED. MACHINE COMPANY.

CLUTCH MECHANISM.

Specification 0! Letters Patent.

Patented Aug. 31, 1915.

To all whom it may concern:

Be it known that I, HENRY Kr'in'ramm, a citizen of the United States, residing at Wyoming, Luzerne county, Pennsylvania, have invented a new and useful Clutch Mechanism, of which the following is a specification.

This invention relates to an improvement in clutch mechanisms, one object be1ng to provide a more speedy and powerful device wherein the disengagement of the clutch parts is facilitated, and the sound of their engagement materially reduced.

A further object is to provide a compact, well balanced, easily running clutch WhlCh may be readily manufactured, assembled and disassembled.

In the drawings, Figure 1 is a side View of one embodiment of the invention applied -to the well-known Wales adding or calculating machine, the usual casing or bonnet being partly broken away. Fig. 2 IS an edge, view, partly in section, of the clutch mechanism alone. Fig. 3 is a side view of the carrier with the parts assembled thereon. Flg. lis a view of the clutch mechanism, showing the side opposite that disclosed in Fig. 3, and illustrating the positions of the parts when the detent is tripped. Fig. 5 is a similar view, showin the clutch (partially rotated, the detent eing restore to effective position. Fig. 6 is a side view, illustrating a detent-tripping mechanism in use on the Wales adding or calculating machine, only such parts of the machine being shown as intimately cooperate with the clutch. Fig. 7 is a detail perspective of one form of re cessed clutch member or ratchet. Fig. 8 is a sectional view through the clutch mechanism. I

Although the invention is illustrated in connection with a l/Vales adding or calculat ing machine, it may obviously be applied to various other mechanisms.

In adding machines of the key-set type, the registering, or printing mechanisms, or both, are commonly operated b a main shaft which is partially rotated in one direction and then released. Upon the release of the main shaft, a spring returns the parts to their normal positions. Referring to Fig. 6, the base plate 1 of such adding machine supports side frames 10, (one only of which is shown), in which is journaled a main shaft 11. A crank 2 on said shaft engages tion of the printing mechanism through a 'link 14.

The main shaft may be operated b amotor 200, the casing or bonnet 201 0 which is secured to the under side of the base plate by bolts 202. Said motor drives a worm shaft 4'(F1g. 1) journaled in suitable bearings 5 within the casing, and having a worm 223 thereon in mesh with a worm gear 224, preferably loosely mounted on a drive shaft 203, extending transversely relatively to the worm shaft and journaled in the sides of the casing or bonnet. When the machine is in use, the motor runs continuously, thereby turning the worm gear continuously. Said drive shaft ma have a double crank or cross-arm 204, Fig.'6,) fixed thereto, each arm of which carries a wrist 205, adapted to strike the drivin toe 206 of a driving rack 15, to move said rack rectilinearly in one direction throughout substantially one half a revolution of the shaft. Teeth on the rack 15 mesh with a segmental gear 12 fast on the main shaft 11 to partially rotate the latter and thereby effect the operation of the registering and recording mechanisms.

At the end of the driving stroke of the rack (shown in dotted lines in Fig. 6), the active wrist 205 rides oil or frees itself from the driving toe to enable the adding machine parts to be returned to normal positions by the usual spring 9 connected to the main shaft by an arm 9. Said rack is guided in its reciprocatory motion by a stud 16 projectin through a slot in the rack.

-A c utch mechanism or couplin connects the motor with the drive shaft. S aid clutch in the present instance, comprises a notched or recessed clutch member, as a ratchet 229 (Fig. 7), preferably fixed to the hub 6 (Fig. 8) of the worm gear 224 by a mortise and tenon joint 228, to turn therewith. Obviously other means may be employed to effect the rotation of the ratchet in unison with the worm gear. The cotiperatin clutch member comprises a carrier or p ate 233 (Figs. 1, 2 and 3) having an annular flange 231 on one side, and fixed to the drive shaft 203 by a cotter pin 232 passing through said shaft and through the hub 231 on the opposite side of said carrier.

Pawls or dogs 241 pivotally secured at 240 to the inner arms of oppositely disposed el-' bow levers 236 pivoted by studs 235 to said carrier, connect the latter with the ratchet. Said pawls are slidably mounted in guide seats in the annular flange 231 through which they project, their inner ends being shouldered, as shown in Fig. 3 to enter and firmly engage the recesses 230 in the clutch member 229. The periphery of clutch member 229 is preferably but slightly greaterthan the shaft on which it rotates, whereby to reduce the peripheral speed of theratchet,

, it being of less diameter than the worm gear 224, the object beingto tend to prevent the pawls from jumping one or morenotohesv when first taking hold. Springs 239 (Figs.

2 and 3) tend to force said pawls into engagemeiit with the recessed clutch member at all times, said springs being mountedon guide rods 238, each of which is 'pivotally.

connected at 237 to projections on the outer arms of the elbow levers 236. The opposite ends of said ide rods are slidably supported in gui e studs 234 projecting laterally from one side of thecarrier 233 and against which the adjacent ends of the springs bear. Y 7

Normally the clutch is held inactive by means of a detent 21 9,- 220 (Figs. 1,4 and 5). Said detent is mounted on arock shaft; 217 with its outer end 220 normally in'thepath of any of a plurality of preferably equidistant pawl-releasing arms 246. Said pawls from the recesses. -This engagementof the detent and pawl-releasing arm occurs,-

arm'seach' have apin and slot, connection 242, 245 with the outer arms of the elbow levers 236, and project from a ring 8 common to all the arms 246, said ring being loosely mounted, preferably, on the. annular flange 231%. The arrest of one pawl-releasingarm, therefore, will arrest all the armsto eflect the simultaneous withdrawal of the preferably, at the time when the active wrist ,6.) has freed itself from the toe 206 of 17 there. is no load on the clutch. The

(Figs-4 and 5) to accommodate the ivot stu s 235 of the elbowlevers and the t row of said pawl releaser may be arrested by said slots.

TA presstzreor speed-acceleratingarm 24? (Figs; 1, 4 and 5) is pivotedat 250 to a' sta tionfary part of'the case 201, its free end bemgheld, as by a spring 248, against one of a plurality of cam surfaces 251 formed on the periphery of the carrier 233. Said'free end may have a roller 253 thereon. As the drive shaft has completed a half rotation, and

after-the wrist has released the rack, the

he endof the pressure arm, which has ridden along the cam surface 251 (thereby increasing t e tension of its spring), passes e driving rack 15, at which time. I pawi releasing arms may be slotted, as at 244, 7

over the high point 251 of the cam onto an incline 249. The spring 248 presses the arm 247 firmly against said inclined face 249 to advance, the cam and the clutch pawls 241 carried thereby ahead of the ratchet, or in other words, the clutch pawls, which have been turned by the ratchet, are speeded ahead of said ratchetby the pressure of the arm 245 against the inclined face 249, to move the pawls away from the walls of the recesses pressing against them, to facilitate their withdrawal from the ratchet, by relieving the frictional clutching pressure of the ratchet on the pawls. This forward movement or lead of the carrier relatively to the drive member 229, first brings the outer ends 246 of the pawl-releasing arms, intocontact with the detent, which arrests the arms and the continued lead thereaften.

aided by the inertiaof the carrierand .its

connected parts, advances the pivotal points,

235 of the elbow levers 236, theiouter. ends of which areiconnected tothe arms of the pawl releaser. The" resulting action is similar to that which would-take placerif the carrierwas held stationary and'thepawl releaser turned'backwardly. The elbow, levers rock on their pivots against the tension of springs 239to'withd'raw the pawls from en- 209 pivoted at 210. Said bar orkey 208- is removably supported on'stems 208 having angularly-extending lugs 208 apertured to receivestop pins 208 on the arms of levers 209, whereby when the bar.208is removed, the stems are held against turning on pivots 208 and'hanging down within the machine casing (not shown), in. which posi- 7 tion theywould be inaccessible until the machine casing is removed The stop pins are of less diameter than the apertures .in the lugs 208 to enable the stems and key to 'accommodatethemselves to the swing of the bent levers 209. Av link 211' connects the opposite arms of the levers 209 so that they will move in parallelism,one of said levers" being connected by a link 212 to a crank 213 v on a rock shaft 214.- A second crank 214 on said rock shaft is connected by a link 215 with an arm 21-6 onrock shaft 217 to which the detent 219 is secured, whereby to trip or disable said detent tofree the pawl-re.

leasing armjheld thereby, when the motor key is depressed. A stop 256 (Figs. 1 and 4) may be provided to arrest the backward throw of-the detent 219. When the pawl-releasing arm 243 is freed, the springs 239 rock the elbow levers 236 to thrust the pawls 241 into the recesses 230 of the ratchet 229, to effect the clutching action, and in so doing, turn the pawl releaser on the flange 231*. During the disengagement of the pawls, the carrier and its flange turn relatively to the pawl releaser, as above stated, to withdraw the pawls, such operation, in effect, returning the pawl releaser to its original position.

The engagement of the pawls and ratchet may be attended by some concussion, to deaden or minimize the sound of which, the ratchet 229 is fitted snugly into the annular flange 231 (Fig. -8) which latter completely surrounds and incloses the ratchet. Furthermore, the notches qr recesses 230 in the periphery of said ratchet do not in the present instance extend to the sides thereof. Thus there is left an unbroken annular sur face at each edge of the ratchet (see Fig. 7') which has a running fit against the inner periphery of the annular aw. By this construction resonance chambers which would amplify the sound of impact of the pawls and ratchet are eliminated.

The detent 219 is automatically restored or interposed in the path of the pawl release arms 246 by means of the cams 251 which are oppositely disposed on the carrier 233. The nearest cam wi es against a tappet 221 (Fig. 5) on the sha t 217 to rock the latter and swing the detent or intercepter back into effective position to disconnect the motor from the adding machine, to enable the adding machine parts to be returned to normal position by the spring 9. The depression of the motor key 208 in freeing the pawl release arm swings said tappct inwardly toward the cam 251 (see Fig; 4), said cam having a recess or depression 252 which is brought. opposite the tappet as the clutch is thrown out, to enable the detent to be thrown backwardly suffisoon as the clutch becomes effective, the cam is rotated to bring its operative surface 251 against the tappet and return the detent to effective position rior to the completion of a half rotation of thedrive shaft. It will be seen that such cam action restores the detent even though the operator still attempts to hold the motor key depressed. Ordinarily the motor key is returned to idle position by a spring 218 (Fig. 6) connected to the side frame 10 and to one of the ent levers 209.

The equidistant pawl-releasing arms and cams together with the pawls, pawl levers and springs form a balanced, easily-running clutch. The clutch parts may be quickly applied to and removed from the shaft, and are readily manufactured, it being noted that the pawl mechanism is supported on a single carrier. Furthermore the cams on said carrier not only restore the detent to effective position, but are also acted upon by thepressure arm in releasing the pawls from their ratchet. It will be seen that though two sets of pawls, cams and pawlreleasing arms are shown, it is obvious that one or more sets may be used depending upon the number of times it is desired to release the clutch during one rotation of the drive shaft.

The worm gear 224 may be chambered (see Fig. 2) to contain a lubricant 225 which is fed to the worm through holes 226 in the periphery of the ear.

Briefly recapitu ated, the operation of the invention is as follows: Assuming the parts to be in the positions shown in Fig. 1, the clutch being idle or in released position, and the motor 200 turning the worm shaft 4 and worm'gear 223 which rotates the worm wheel 224 and ratchet 229 idly on the drive shaft 203, a depression of the starting key 208 (Fig. 6) rocks bell crank levers 209 against the tension of spring 218 to draw link 212 rearwardly and, through crank 213, rock shaft 214, crank 214, link 215 and crank 216, rocks shaft 217 to retract the detent 219, 220, and free the pawl releasing arm 243. Thereupon, the springs 239 (Fig. 3) expand to rock the levers 236 on their pivots 235 and thrust the pawls 241 into mesh with the teeth of the ratchet 229. The springs 239 also turn the ring 8 with its pawl releasing arms, on the flange 231, through the pawl levers whose outer arms have pin and slot connections 242, 245 with the pawl releasing arms. The pawls, when in mesh, connect the ratchet 229 with the carrier 233 fast on the drive shaft 203 to turn the latter and cause one of the wrists 205 (Fig. 6) to press against the toe 206 of the driving rack 15 and shift the latter to its dotted line position. The rack, during such travel, because of its engagement with the segment 12 on the main shaft 11, turns the latter forwardly, to cause the crank 2 on the shaft to traverse the slot in arm 3 and effect the operation of the registering mechanism (not shown). Also, the crank 13 on the main shaft is rocked to shift the link 14 connected thereto, and effect the operation of the printing mechanism, (not shown). Furthermore, the arm 9 on the main shaft is rocked to tension the restoring spring 9. As the drive shaft 203 completes a half rotation, the active wrist or crank 205 rides oil' the toe 206 to permit the restoring spring 9 to rock the main shaft 11 in the reverse direction and return the machine parts to their normal idle positions. The main shaft 11, on its return stroke, turns the segment 12 to draw the rack upwardly, and such action may be assisted by the spring 207 (Fig. 6). During the rotation of the carrier 233, one of its cams 251 forces the pressure arm 247 outwardly (Fig. to tension the spring 248, and the-other of the cams 251 presses the tappet 221, 222 outwardly to rock detent 219, 220 back into the 'pathof the projecting end I 246 ofpawl release arm 243, so that as the drive shaft 203 completes a half revolution, and after the machine load has been released, the. spring-pressed arm 247 rides down the incline 249 on the carrier and forces the driven member of 'the clutch forwardly ahead of the drive member (the ratchet 229) to automatically relieve the pressure of the ratchet against the paWls 241, and bring the outer end 246 of the pawl-releasing arm against the. detent 220, whereupon, both pawl-releasing arms are arrested. The

' driven member of the clutch (the carrier, its

tension of t eir springs 239 to withdraw the pawls from the ratchet and leave the parts in their idle positions shown in Figs. 1 and -6, in readiness for another operation.

ingme'mber' when the What I claim as new," is I 1. In a clutch mechanism including driving and driven members,means to eifect the disengagement of the members, and to automatically relieve the clutching action prior to the disengagement of the driving and driven members.

2. In a .clutch'mechanism, includin driving and driven members, means to e ect the disengagement of said members, and a speedaccelerating means to give the driven member a lead over thedriving member to facili tate said disengagement.

v 3. In a clutch mechanism, the combination with a driven pawl-carrying member, a driving member, and means tending to engage the pawl with the driving ,member,-of a detent to hold said pawl idle, and means to speedthe driven member ahead of the drivpawl is tobe rendered inactive.

" 4. In a. clutch 4 mechanism including driving and driven members, one of which has a pawl to engagethe other member, means to disengage said members and hold the clutch inactive including a pawl-releaser, means tending to drive the ipawl-releaser in one direction to render the pawl efiective,a detent to restrain said pawl-releaser against menace movement, and means to speed the pawlcarrying member ahead of the remaining member to free the pawl from the pressure of the driving member, when the members are to be disengaged.

5. In a clutch mechanism including co-- operating clutch members, an interceptor or.

detent to normally hold the clutch idle, means to trip the inter'cepter to enable the clutch to become effective, means to restore the intercepter to' active position, and: a

pressure arm-engaging said restoring means to advance one of the'clutch members ahead of the other to relieve the strainon the .detent when theclutch is released.

c. The combination with driving and driven shafts, of clutch membersto connectv said shafts, a detent to normally hold the clutch idle, means to trip the detent to enable the clutch to become efi'ective,a cam to return the detent to operative position, said cam having an inclined face, and a pressure arm coiiperatingwith said inclined face to Y advance one of said clutch members ahead of the other to facilitate the disengagement of the members. I

7 In a clutch mechanism, the combination with driving and drivenmembers, of a pawl carried by one of the members, means tending to thrust the pawl into engagementwith the other of said members, a lever to'which the pawl is connected, a pawl-releasing member connected to the lever, a detent releasabl engaging said pawl-releasing member to hold" the pawl idle, and means toautomatically restore the detent to effective position.

a In a clutch, the combination with dri-veand driven members; and means to releasably' connect said members; of a releaser connected with said means; a detent normally' contacted by. said releaser to main: tam the clutch members disconnected; and

means. to operate upon the driven member to facilitate the disengagement ofthe clutch members by the releaser. v

9.111 a clutch mechanism, the combination with a ratchet member; of a co-acting member comprising a flange to encircle the ratchet, a pawl mounted for substantial radial movement through the wall of the flange; means tending to project the pawl into engagement with the ratchet; a pawl releaser connected to the pawl and turned by the pawl-projectingmeans; and a shiftable detent normally in the path of the releaser to restrain the eiie'ctive action of the pawl.

10. In a clutch mechanism-,the combination with a drive member; of a, driven member comprising a carrier a pawl mounted on the carrier; means tending to engage the pawl with the drive member; a pawl releaser mounted on the carrier to permit relative movement between the carrier and-releaser, said releaser having a loose connection with the pawl; and a shiftable detent in the path of the releaser to maintain the pawl idle.

11. The combination with driving and driven shafts, of a clutch mechanism including a recessed member journaled on one of said shafts, a flange fast on said shaft and into which the recessed member is fitted, a pawl in said flange tending to engage the recessed member, a detent to hold the pawl normally idle, and means to displace the detent to enable the pawl to enter a recess in said member.

' 12. In a clutch mechanism, a recessed clutch member, a'clutch pawl to cooperate therewith, a lever pivotally connected to the pawl, means tending to throw the dog into operative engagement with the recessed clutch member, releasing mechanism pivotally connected with the lever, an intercepter or detent to engage the releaserto hold the pawl normally idle, and means to displace the intercepter.

13. In a clutch mechanism, a recessed clutch member, a pawl to cooperate there-- with, a lever pivotally connected to said pawl; a clutch release including a shiftable arm pivotally connected with said lever, means to turn the arm to render the pawl effective, and a detent removably interposed in the path of said arm to maintain the clutch idle by holding the arm against turning.

14.-A balanced clutch mechanism comprising an annular, recessed clutch member, a cooperating clutch member including an annular flange arranged concentrically to therecessed clutch member, pawls seated at substantially equidistant points in said flange to engage the recessed clutch member, a pawl release including a rotatable ring having a swinging arm for each pawl, the arms being approximately equidistant, levers connecting the respective pawls and arms, a detent normally in the path of the arms to hold the pawls idl'e, means to trip the detent, and cams to restore the detent to effective position.

15. In a clutch mechanism, the combination with a recessed clutch member, of a cooperating clutch member including an annular flange, a plurality of pawls seated in said flange to engage the recessed clutch member, a carrier turning with the flange, bent levers on the carrier, one end of each lever being connected to its respective pawl, means tending to thrust the pawls into engagement with the recessed clutch member, a pawl-releaser journaled on the annular flange and having projecting arms, the remainin ends of the bent levers connected with sald arms, and a detent removably interposed in the path of the adjacent pawlreleasing armto hold the clutch idle.

16. In a clutch mechanism, the combination of cooperating clutch members; a spring-pressed pawl on one of said members adapted to engage the remaining member; pawl-releasing mechanism connected to the pawl; a detent normally contacted by the pawl-releasing mechanism to hold the pawl inactive; means to displace the detent; means operable by the clutch to restore the detent to effective position; and means to facilitate the disengagement of the pawl and cooperating clutch member by the pawl releasing mechanism.

17. In a clutch mechanism, the combination with clutch members; and means to releasably connect said members; of a releasing member operable upon said connecting means; a detent normally contacted by the releasing member to hold the connecting means idle; means to trip the detent; and means operated by the clutch to automatically restore the detent to effective position.

18. In a clutch mechanism, the combination with clutch members; and means to releasably connect said members; of a releasing member operable upon said connecting means; a detent normally contacted by the releasing member to hold the connecting means idle; means to trip the detent; and a cam on one of the clutch members to automatically restore the detent to effective position.

19. In a clutch mechanism, the combination with clutch members; and means to releasably connect said members; of a releasing member operable upon said connecting means; a detent normally contacted by the releasing member to hold the connecting means idle; means to trip the detent; a cam on one of the clutch members to automatically restore the detent to eflective position; and means acted upon by and acting upon the cam to advance said clutch member to facilitate the disengagement of the connecting means.

20. In a clutch mechanism, the combination with drive and driven members; of a pawl carried by the driven member and normally tending to engage the drive member; a lever mounted on the driven member and having a pivotal connection. with the pawl; an arm mounted to turn on and carried by the driven member, said arm having a pivotal connection with the lever; and a detent normally in the path of the arm to hold the pawl inactive.

21. In a clutch mechanism, the combination with drive and driven members; of a pawl carried by the driven member and normally tending to engage the drive member; a lever mounted on the driven member and having a pivotal connection with the pawl; an arm mounted to turn on and carried by the driven member, said arm having a pivotal connection with the lever; a detent normally in the path of the arm to hold the pawl inactive; means to trip the detent; and means to automatically restore the detent into the path of the arm.

22. In a clutch mechanism, the combination with drive and driven members; of a pawl carried by the driven member and normally tending to engage the drive member; a lever mounted on the driven member and having a pivotal connection with the pawl; an arm mounted to turn on and carried by the driven member, said arm having a pivotal connection with the lever; a detent nor mally in the path of the arm to hold the pawl inactive; means to trip the detent; and a cam on the driven member to automatically restore the detent into the path of the arm.

23. In a clutch mechanism, the combination with drive and driven members; a c0nnecting means; releasing means for the con necting means; a detent with which the releasing means contacts to hold the connecting means idle; means to trip the detent; and means operable at a predetermined point on the driven member to impart a lead to the latter, over the drive member, and cause the releasing means to" strike the detent.

24. In a clutch mechanism, the combination with drive and driven members; a connecting means; releasing means for the connecting means; a detent with which the releasing means contacts to hold the connecting means idle; means to trip the detent; and means rendered effective by and operable at a predetermined, point on the driven member to impart a lead to the latter, over the drive member, and cause the releasing means to strike the detent. a

25. The combination with drive and driven members, .the' latter having a releasable connection with a load; and means to connect said members; of means to automatically cfiect the disconnection of said members when the driven member has released its load.

26. In a clutch mechanism, the combination with drive and driven members; and means to connect the drive and driven members; of a releasing device operable upon the connecting means to hold it idle; a detent normally in the path of the releasing device to hold it effective; a resetting member connected with the detent; means to turn with the driven member to contact the resetting means and rock the detent into the path of the releasing device; the resetting member normally lying in idle position when the detent is eiliective; and. means, including a touch bar, to trip the detent, and shift the resetting member into effective position.

27. In a clutch mechanism, the combination with drive and driven members; and means to connect said members; of a releasing device operable upon the connecting means to hold it idle; a detent normally in the path of the releasing device to hold it effective; and means to trip the detent, including a key bar; parallel motion levers on which the keybar is mounted; a trip shaft to operate the detent; and mechanism to connect the parallel motion levers and trip shaft; the trip shaft being adapted to operate the detent. p

28. In a clutch mechanism, the combination with drive and driven members; and means to connect said members; of a releasing device operable upon the connecting means to hold it idle; a detent normally in the path of the releasing device to hold it effective; and means to trip the detent, in cluding a keybarg'parallel motion levers on which the keybar is mounted; a rock shaft operable by the parallel motion levers; and a trip shaft connected with the rock shaft, and effective to operate the detent.

29. In a clutch mechanism, the combination with drive. and driven members; and means to connect said members; of a releasing device operable upon the connecting means to'hold it idle; a detent normally in the path of the releasing device to hold it effective; and means to trip the detent, including a key bar; angular levers on which the key bar is mounted; means which con-i nects the levers to cause them to rockin unison when the key bar is depressed; a trip shaft to operate the detent; and mechanism to connect the levers and trip shaft.

30. In a clutch mechanism, the combination with drive and driven members; and means to connect said members; of a releasing device operable upon the connecting means to hold it idle; a detent normally in the path of the releasing device to hold it efl'ective;'and means to trip the detent, including a key bar; parallel motion levers on which the key bar is mounted; a trip shaft to operate the detent; mechanism to connect the parallel motion levers and trip shaft; the trip shaft being adapted to operate the detent; and yielding means to restore the ke) bar to initial position.

HENRY KUNTZLER.

In the presence of- IIENRIK J. SCHMIDT, J. Anvm JANSSON.

1 It is hereby certified that in Letters Patent No. 1,151,803, granted August 31,

1915, upon the application of Henry Kiintzler, of Wyoming, Pennsylvania,

for an improvement in Clutch Mechanism," an error appears in the printed specification requiring correction as follows: Page 2, line 74, for the reference- .numeral 245 read 247; and that the said Letters Patent should be read with this correction therein that the same may conform to' the record of the case in the Patent Oflice. I

' Signed and sealed this 21st day of September, A. D., 1915.

J. T. NEWTON,

Acting Commissioner of Patents.

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